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<pre class="textdiagram" id="fig28">
|   Client  |
|           |
+-----------+
|           |
+-----------+       +---------+
|    REQ    |       |  Data   |     Client sends this
\-----+-----/       +---------+
      |
      |  "My identity is empty"
      v
/-----------\       +---------+
|  ROUTER   |       |  UUID   |     ROUTER invents UUID to
+-----------+       +-+-------+     use as reply address
|           |       | |
|  Service  |       +-+-------+
|           |       |  Data   |
+-----------+       +---------+
</pre>
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